Documented failure points and real market prices for the Mack Granite, sourced and dated.
Confidence 0%7 observed comparables
As of Sep 5, 2026What can make the cheap machine expensive?
Internal EGR cooler cracking/tube erosion is very common on MP7/MP8 engines in a wide high-mileage band, with meaningful repair cost.
Cost not yet verifiedCopper injector cups sealing the injectors to the head start leaking fuel into coolant between 300,000-600,000 miles.
Cost not yet verifiedPressed cam lobes can spin on the hollow shaft on higher-mileage MP8 units, with a costly repair.
Cost not yet verifiedMP8 SCR efficiency faults can escalate to a hard 5 MPH derate.
Cost not yet verifiedCommon questions
How much does a used Mack Granite cost?
Observed listings range roughly $95,000 to $144,900 depending on age, condition, and configuration (as of 2026-09-05).
What fails on the Mack Granite?
The most cited concerns in our evidence record: EGR cooler, injector cups, camshaft. See the risk breakdown above for details and sources.
From the research record
- FAILURE (2026-09-05, agent-fetched, Claude spot-verified sample): EGR cooler: "Internal EGR cooler crack or tube erosion (very common on MP7/MP8 around 400K-700K miles)" https://carcodefinder.com/diesel/codes/volvo-mack-mp8-egr-cooler-coolant-leak/
- FAILURE (2026-09-05, agent-fetched, Claude spot-verified sample): injector cups: "Copper injector cups seal the injectors to the head. Many start leaking between 300,000 and 600,000 miles, pushing fuel into coolant and air into the fuel rail." https://www.cherishyourcar.com/mack-mp8-engine-problems/
- FAILURE (2026-09-05, agent-fetched, Claude spot-verified sample): camshaft: "Pressed cam lobes can spin on the hollow shaft on higher-mileage units, usually past 400,000 miles." https://www.cherishyourcar.com/mack-mp8-engine-problems/
- FAILURE (2026-09-05, agent-fetched, Claude spot-verified sample): aftertreatment / 5 MPH derate: "See an SCR efficiency code like SPN 4364 FMI 18. If readings stay out of range, it limits power. Finally a 5 MPH derate under SPN 5246 FMI 0." https://www.cherishyourcar.com/mack-mp8-engine-problems/
- MARKET (7 listings observed 2026-09-05): low $95,000 / median $95,000 / high $144,900. Agent-sourced: 6 of 7 real listings are $95,000 from one dealer (Vanguard Truck Center-Tolleson, 2018-2019, 209k-225k mi -- a fleet lot, not diverse market sampling), plus one differentiated 2021/138k-mi unit at $144,900. Real, current asking prices; low diversity flagged for transparency.
Sources
- carcodefinder.com (failure evidence)repair-industry · verified · accessed 2026-09-05
- cherishyourcar.com (failure evidence)repair-industry · verified · accessed 2026-09-05
- soarr.com dealer inventory (7 listings observed 2026-09-05)dealer-inventory-aggregator · verified · accessed 2026-09-05